medium · Market Microstructure mmf-core

A 'spoofing' trader wants to buy 10,000 shares of a stock currently quoted at $50.00 bid and $50.02 ask. They place a large fake sell order for 50,000 shares at $50.01, causing the bid to drop to $49.95.

If the trader then buys their 10,000 shares at $49.96 and cancels the fake order, how much did they 'save' compared to buying at the original ask?

  1. $500
  2. $400
  3. $600
  4. $5,000

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